Introduction Dark mode isn’t just a trend anymore—it’s an expectation. From Windows and macOS to iOS and Android, users want the option to switch from a blinding white background to a sleek, eye-friendly dark interface. But here’s the good news: You don’t need to redesign your entire website. With a few smart CSS rules and a sprinkle of JavaScript, you can add dark mode to any website in under 30 minutes. In this article, I’ll show you three methods—from quick-and-dirty to fully professional. Method 1: The “Browser Native” Approach (Easiest) Modern browsers now support prefers-color-scheme, a CSS media query that detects if a user has dark mode enabled in their OS settings.…